如何从对象的值提取到一个新的类型别名

[laters]

How to extract a new type alias from an object's value

const test = {
'a': ['music','bbq','shopping'],
'b': ['move','work']
};

如何从 test 对象中得到

type Types = 'music' | 'bbq' | 'shopping' | 'move' | 'work'

[zy0829]

type Types<T> = T[keyof T]